Edwin benjamin



(No Model.)

E. BENJAMIN.

MOLDING GUTTER.

No. 410.572. l Patented Sept. 10, 1889.

A v M a da/ffy.

l UNITED STATES PATENT OFFICE.

EDIVIN BENJAMIN, OF SOUTH EVANSTON, ILLINOIS, ASSIGNOR TO THE BENJAMINMACHINE COMPANY. y

MOLDING-CUTTER.

SPECIFICATION forming part of Letters Patent No. 410,572, datedSeptember l0, 1889.

Application filed May l, 1889. Serial No. 309,162. (No model.)

To all whom, it may concern:

Be it known that I, EDWIN BENJAMIN, of South Evanston, in the county ofCook and State of Illinois, have invented certain new and usefulImprovements in Molding-Cutters for Vood-lVorking Machines, of which thefollowing` is a specification.

In making cutters for moldings it is desirable,both as a matter ofconvenience in grinding and econom yin making and security from crackingin hardening, that cutters which form the outline of the Inolding shouldbe made in separate pieces, which when placed together will produce thedesired shape, and this expedient is therefore frequently resorted to.The divisioirlines between the cutters are determined by the angles iuthe shape to be produced for the most part, and it will thence resultthat sometimes the cutter-face will be very narrow, and hence the cutterwill lack strength unless made very deep. The latter is an expedientwhich is wasteful of material and necessitates the use of a largercutterhead than would otherwise be necessary. The latter is decidedlyobjectionable in many instances. In the cutters shown in theaccompanying drawings and herein described I have endeavored to avoidthe objectionable features mentioned.

In the drawings, Figure l is a plan View, Fig. 2 a section on line 2 2,Fig. l, Fig. 3 a side elevation, and Fig. 4 a perspective view, of acutter-head adapted to be fitted with my improved cutters. Fig. 5 is aperspective of the cutters detached. Fig. 6 is a side elevation of thecutters and head on a smaller scale than Fig. 3, showing them operatingupon a board to form a groove on its edge.

The main or central portion of the cutterhead A has formed in it thegrooves B B for the reception of the cut-ters C I). Rings E E areattached to each end of the cutter-head, and set-screws G H, passingthrough the rings, abut against the cut-ters when placed in the groovesB B and keep them in place. As the cutter C is smaller in both sectionaldimensions than cutter D,it is deficient in strength and stilfnessunless the cutter D be made excessively large, which in turnnecessitates an increase in the size of the cutter-head beyond whatwould otherwise be necessary, and the like diliiculty occurs with othercutters for making moldings and various beaded or irregular surfaces.

In order to re-enforce the weaker cutter, I lit the two cutterstogether, as best shown in Fig. 5, by cutting a shallow rabbet or groovec along or near the back or outer edge of the cutter C and making atongue CZ to correspond therewith on the cutter D. The stiffness ofcutter D will thus operate to keep the cutter C from springing or beingdisplaced outwardly. I prefer to make the groove at the outer edge ofthe smaller cutter, as shown, because it is Inore remote from thecuttingedge and involves the least Work in the manufacture of thecutters.

l. The combination, in heads for cutting moldings, of cutters fitted toeach other by tongues and grooves.

2. The combination, in heads for cutting moldings, of two or morecutters united to produce the desired outline, the smaller cutter orcutters being rabbeted at or near its outer edge and the larger beingtongued to correspond, as and for the purpose set forth.

EDWIN BENJAMIN.

Witn esses:

P. H. T. MASON, J. I. VEEDER.

